Bonner Durchmusterung +49°1961

light-years

Catalog numbers:
     Gliese (Gl) 392, Henry Draper (HD) 90508, Bonner Durchmusterung (BD) +49°1961, Hipparcos Input Catalog (HIC) 51248, Smithsonian Astrophysical Observatory (SAO) 43351, Hoffleit Bright Star (HR) 4098
Age: 5400 million years
Source for age: Don C. Barry, "Chromospheric Age Dependence of…", APJ 334
Heavy element abundance: 59% of Sol
Standard error in heavy element abundance: 0%
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: binary
Right Ascension and Declination: 10h28m3.829s, +48°47'6" (epoch 2000.0)
Distance from Sol: 76.8 light-years (23.6 parsecs)
Standard error in distance: 1.7816%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -46.6, 19.8, 57.8
Galactic (X,Y,Z) coordinates in ly: -42.1, 11.2, 63.3
Proper motion: 0.886 arcsec/yr (175.0° from north)
Radial Velocity: -6.8 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 21.6, -94.1, 22.7

What do all these fields mean?


Component A:
Catalog numbers:
     Luyten Half-Second (LHS) 2266
Spectral class: F9
Luminosity Class: V
Apparent visual magnitude: +6.44
Absolute visual magnitude: +4.58
Visual luminosity: 1.28 x Sol
Color indices: B-V= +0.60, U-B= +0.05, R-I= +0.24
Diameter: 0.95 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.13 A.U.s
Angular size of star in sky in CZ: 0.447112 degrees


Component B:
Catalog numbers:
     Luyten Half-Second (LHS) 2267
Spectral class: M
Luminosity Class: V
Apparent visual magnitude: +12.50
Absolute visual magnitude: +10.64
Visual luminosity: 0.0048 x Sol
Diameter: 0.41 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.070 A.U.s
Angular size of star in sky in CZ: 3.144386 degrees

light-years
but not more than light-years away
Data for this star system were most recently updated on 4-April-2001.